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CVE-2019-11755

Date: September 27, 2019

A crafted S/MIME message consisting of an inner encryption layer and an outer SignedData layer was shown as having a valid digital signature, although the signer might have had no access to the contents of the encrypted message, and might have stripped a different signature from the encrypted message. Previous versions had only suppressed showing a digital signature for messages with an outer multipart/signed layer. This vulnerability affects Thunderbird < 68.1.1.

Severity Score

Related Resources (14)

https://usn.ubuntu.com/4202-1/
https://usn.ubuntu.com/4335-1/
https://seclists.org/bugtraq/2019/Nov/24
https://lists.debian.org/debian-lts-announce/2019/11/msg00017.html
https://nvd.nist.gov/vuln/detail/CVE-2019-11755
https://www.mozilla.org/security/advisories/mfsa2019-32/
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
https://bugzilla.mozilla.org/show_bug.cgi?id=1240290
https://www.debian.org/security/2019/dsa-4571
https://security-tracker.debian.org/tracker/CVE-2019-11755
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-11755
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
https://access.redhat.com/security/cve/CVE-2019-11755
https://www.mend.io/vulnerability-database/CVE-2019-11755

Severity Score

Weakness Type (CWE)

Improper Verification of Cryptographic Signature

CWE-347

CVSS v3

Base Score:
Attack Vector (AV):
Attack Complexity (AC):
Privileges Required (PR):
User Interaction (UI):
Scope (S):
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV):
Access Complexity (AC):
Authentication (AU):
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE
Additional information:

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